CN1082454C

CN1082454C - Top of form setting apparatus for printer

Info

Publication number: CN1082454C
Application number: CN97113152A
Authority: CN
Inventors: 铃木完次
Original assignee: Star Micronics Co Ltd
Current assignee: Star Micronics Co Ltd
Priority date: 1996-05-17
Filing date: 1997-05-16
Publication date: 2002-04-10
Anticipated expiration: 2017-05-16
Also published as: US5873507A; KR100332999B1; BR9702392A; JPH09300749A; CN1166408A; KR970073999A

Abstract

A top of form setting apparatus for a printer, which has a printing device for printing on paper, a paper storage for storing the paper, a paper feeding device for feeding the paper in a forward direction toward the printing device and in a reverse direction toward the paper storage, a controller for controlling the printing device and the paper feeding device, a paper top detector for detecting a top of the paper fed by the paper feeding device, a paper reverse feeding device for reversely feeding the paper which has been set at a printing position until reaching a detecting position of the paper top detector, and further for reversely feeding the paper by a predetermined amount, and a paper forward feeding device for forwardly feeding the paper which has been fed in a reverse direction by the paper reverse feeding device until reaching the detecting position of the paper top detector, and further for forwardly feeding the paper by a predetermined amount, thereby setting the paper top at a predetermined position.

Description

The top of form setting apparatus of printer

The present invention relates to a kind of top of form setting apparatus of the printer that on continuous paper (for example a string account ticket), prints, more particularly, relate to a kind of when the operator is installed in paper on one coarse position mistakenly, can carry out position correction, and guarantee top of form is set in the device that is used for printer on the precalculated position.

When printer prints on continuous paper (for example a string account ticket), shown in an example of prior art among Figure 18, need to be set on the preposition with the front end of hand with continuous paper by the operator.One printer 201 is arranged among the figure, a paper feeder and a printing equipment have been installed in this printer.A paper-retaining device 203 has been installed in the outside of printer 201 (left side among Figure 18).Paper-retaining device 203 comprises a paper retainer 205 and a retainer cover plate 207, and paper 209 is stored in this holding device.Paper 209 is continuous, the account ticket of a series of series connection for example, and can it be torn into the independent scraps of paper in perforation place.

The housing 211 of printer 201 is provided with paper inlet.Though do not represented in Figure 18, the paper inlet is the left side that is positioned at Figure 18 middle shell 211.The top of housing 211 also is provided with a paper outlet 213, and print paper 209 can be from this outlet output.In Figure 18, the sidepiece of housing 211 is provided with a knob 215.Knob 215 is the mechanisms that are used for manually handling in the printer 201, and when operator's turning knob 215, the paper feeder that is installed in the housing 211 can drive by this manual control mechanism.

Under so a kind of structure, when being set to the front end of paper 209 on the precalculated position by manual operations, operator 217 at first will arrest the front end of paper 209 with a hand, paper 209 is inserted housing 211 through the paper inlet, and the front end of paper 209 is put on the paper feeder.Then, operator's 217 usefulness another hand turning knobs 215 drive paper 209, until the front end arrival precalculated position of paper 209.In this case, can near the paper outlet 213 of housing 211, any mark be set, when arriving at this mark, can determine with the naked eye that the front end of paper 209 is set on the precalculated position with the front end of convenient paper 209.

Yet aforesaid manual operation by operator 217 seems very complicated and bothers.Therefore, need provide a kind of and can be automatically the front end of paper 209 be set to device on the precalculated position.Disclosed such device among uncensored Japan Patent Sho60-76373 and the 61-205160.

For the device that is used for the automatic setting top of form that is disclosed among the uncensored Japan Patent Sho60-76373, operator 217 (for simplicity, to use identical label with 61-205160 to Japan Patent Sho60-76373 hereinafter, operator " 217 " for example) at first paper 209 is inserted housings 211, and the front end of paper 209 is put on the paper feeder.By operation top of form switch, paper 209 is automatically given by paper feeder.Then, detect the front end of paper 209, after the front-end detection of paper 209 arrives, give a predetermined amount, arrive the precalculated position until the front end of paper 209 with paper 209 by a sensor that can detect top of form.

Automatic setting device for the top of form that disclosed among the uncensored Japan Patent Sho61-205160 has set in advance a mark on paper 209.The paper 209 that has been inserted into can be given by paper feeder automatically by the manipulation of top of form switch.Be provided with a sensor in this device, this sensor can detect the mark on the paper 209, so that paper 209 is stopped when being fed to this position, thereby paper 209 is set on the preposition.

Yet, exist following problem in the above-mentioned prior art:

At first, for the top of form automatic setting device that is disclosed among the uncensored Japan Patent Sho61-205160, need on paper 209, set in advance a mark.Therefore, can not utilize and insert general paper, can only adopt the special paper of using that has mark, so just increase cost.

Secondly, for the device that is used for the automatic setting top of form that is disclosed among uncensored Japan Patent Sho60-76373 or the Sho61-205160, may produce such a case, that is, paper 209 can depart from correct position because of operator's operate miss.

As mentioned above, operator 217 inserts housing 211 with paper 209, and the front end of paper 209 is put on the paper feeder.Subsequently, paper 209 is automatically given by paper feeder.Yet, as shown in figure 19, giving automatically in the process of paper, when operator 217 catches paper 209, or when the operator with the paper side of giving in the opposite direction on pulling during paper, just can not carry out the paper of scheduled volume and give, this will cause paper 209 to depart from the tram.

When the operator inserts paper 209 sideling housing 211 mistakenly and is put into paper 209 on the paper feeder, paper feeder can only automatically be given paper 209 under the state of this deflection, can not do any correction to the deflection of position, for example cause situation such as holding paper to take place so sometimes.

For the device that is used for the automatic setting top of form that is disclosed among uncensored Japan Patent Sho60-76373 or the Sho61-205160, when being set to the front end of paper 209 on the precalculated position, just can begin to print, the paper 209 that printing is finished cuts off and output, sets the print position of next paper 209 then according to paper 209 previous printing situations.At this moment, as Figure 20 and shown in Figure 21, when operator 217 when being in paper-tear picture bar on the paper outlet 213, that be used for tearing paper and tearing the paper of printing 209, such a case may take place, promptly, operator 217 pulls out next (continuous) paper 209, and this will cause next paper 209 to depart from correct position.

In addition, as shown in figure 22, operator 217 may maloperation knob 215, and this will cause next paper 209 to depart from correct position.

Usually, for example the paper of account ticket and so on " is printed in advance " and is crossed, and its print position is determined.Therefore, if paper 209 is in the state of a skew, so just required information accurately can not be printed and be put in place.The inaccuracy of this print position may cause grave error.For example, when needing the situation of export credit card, the quantity of funds on account can not be printed in the corresponding hurdle (position) of a kind of like this quantity of expression, this quantity can be printed in the corresponding hurdle (position) of corresponding other quantity on the contrary.

The objective of the invention is to, a kind of top of form setting apparatus is provided, it need not the operation of any complexity or trouble when top of form being set on the precalculated position, and mistakenly paper setting on position, an inaccuracy ground time, can be set to top of form on the accurate position by correction as the operator.

In order to achieve the above object, the invention provides a kind of top of form setting apparatus of printer, comprising: a printing equipment, in order on paper, to print; One paper holder is in order to store paper; One paper feeder, with so that paper forward towards the printing equipment feeding, or oppositely towards the feeding of paper holder; One control device is in order to control printing equipment and paper feeder; One top of form checkout gear is in order to detect the front end of the paper of being given by paper feeder; One reverse paper feeder is set at the locational paper of a printing in order to oppositely to give, and arrives at the detection position of top of form checkout gear up to it, and more further the certain amount of paper feed reversing; An and forward paper feeder, in order to give the paper of oppositely having given by reverse paper feeder forward, arrive at the detection position of top of form checkout gear up to it, and further paper is marched forward to certain amount again, thereby top of form is set on the preposition.

Preferably, in this device, a judgment means can be set, when reverse paper feeder has been carried out the enough amount of feeding so that by the detection position, but not have the time of release by the note detection that the top of form checkout gear carries out, judgment means is inferred as top of form setting mistake.

Oppositely the amount of paper feeder institute's feeding in the process of reverse paper feed is an amount that is enough to eliminate the gear train backlash of paper feeder.

Perhaps, can provide a kind of like this top of form setting apparatus of printer, it comprises: a printing equipment, in order on paper, to print; One paper holder is in order to store paper; One paper feeder, with so that paper forward towards the printing equipment feeding, or oppositely towards the feeding of paper holder; One control device is in order to control printing equipment and paper feeder; One top of form checkout gear is in order to detect the front end of the paper of being given by paper feeder; One first forward paper feeder with so that paper is given forward, arrives at the detection position of top of form checkout gear up to it, and further paper is marched forward to certain amount, thereby paper setting to is printed on the position; One reverse paper feeder in order to oppositely to give the paper of having been given at forward by the first forward paper feeder, arrives at the detection position of top of form checkout gear up to it, and more further the certain amount of paper feed reversing; And one second forward paper feeder, in order to give the paper of oppositely having given by reverse paper feeder forward, arrive at the detection position of top of form checkout gear up to it, and further paper is marched forward to certain amount again, thereby top of form is set on the preposition.

Preferably, in said apparatus, a judgment means can be set, when described reverse paper feeder has been carried out the enough amount of feeding so that by the detection position, but still not have the time of release by the note detection that the top of form checkout gear carries out, judgment means is inferred as top of form setting mistake.

Preferably, oppositely the scheduled volume of paper feeder institute's feeding in the process of reverse paper feed is an amount that is enough to eliminate the gear train backlash of paper feeder.

Preferably, in said apparatus, a judgment means can be set, when first forward paper feeder carried out the enough amount of feeding forward so that arrive the detection position, but the top of form checkout gear is not when still detecting the front end of paper, judgment means is inferred as top of form and sets mistake.

First forward the amount of paper feeder institute's feeding in paper feeding process forward be one and be enough to make the operator can with the naked eye determine the amount of paper.

When utilizing this structure to set paper, or when on a piece of paper down, printing, can top of form accurately be set on the precalculated position, can not be subjected to the influence of operator's maloperation, also can when operation, any trouble not arranged, therefore can improve print quality.

In addition, when setting paper, if the operator catches paper, or draw paper oppositely opposite with paper feeding on oppositely, he will be cautioned.In addition, when the paper deflection mistakenly, the operator inserts and when being put into paper on the paper feeder with the state of this deflection, the operator can also with the naked eye determine whether to occur the holding paper phenomenon.

In addition, in the process of reverse paper feed, the certain amount of feed reversing just can be eliminated the backlash as the gear train of transmission mechanism, thereby the position that the backlash because of gear train causes can not take place is offset.

Describe the present invention in detail with reference to each accompanying drawing below.

Fig. 1 is the side view of a printer according to an embodiment of the invention;

Fig. 2 is the plane according to the printer of the embodiment of the invention;

Fig. 3 is the plane according to the paper of the embodiment of the invention;

Fig. 4 is a stereogram, shows the transmission mechanism according to the paper feeder of the printer of the embodiment of the invention;

Fig. 5 is a cutaway view, shows according to the paper feeder of the printer of the embodiment of the invention and the structure of printing equipment;

Fig. 6 is a cutaway view that amplifies, and shows the part according to structure among Fig. 5 of the embodiment of the invention;

Fig. 7 is a block diagram, shows the structure according to the control device of the embodiment of the invention;

Fig. 8 is a side view, shows the situation of movement according to the device of the embodiment of the invention;

Fig. 9 is a side view, shows the situation of movement according to the device of the embodiment of the invention;

Figure 10 is a side view, shows the situation of movement according to the device of the embodiment of the invention;

Figure 11 is a side view, shows the situation of movement according to the device of the embodiment of the invention;

Figure 12 is a side view, shows the situation of movement according to the device of the embodiment of the invention;

Figure 13 is a side view, shows the situation of movement according to the device of the embodiment of the invention;

Figure 14 is a flow chart, shows the step according to the top of form setting operation of the embodiment of the invention;

Figure 15 is a flow chart, shows the step according to the top of form setting operation of the embodiment of the invention;

Figure 16 is a flow chart, shows the step according to the top of form setting operation of the embodiment of the invention;

Figure 17 is a flow chart, shows the step according to the top of form setting operation of the embodiment of the invention;

Figure 18 is the stereogram of prior art, and paper wherein is in the state of a deflection because of operator's maloperation;

Figure 19 is the stereogram of prior art, and paper wherein is in the state of a deflection because of operator's maloperation;

Figure 20 is the stereogram of prior art, and paper wherein is in the state of a deflection because of operator's maloperation;

Figure 21 is the stereogram of prior art, and paper wherein is in the state of a deflection because of operator's maloperation;

Figure 22 is the stereogram of prior art, and paper wherein is in the state of a deflection because of operator's maloperation;

Below in conjunction with Fig. 1 to Figure 17 one embodiment of the present of invention are described.The external structure of printer at first will be discussed.As illustrated in fig. 1 and 2, printer 1 has a housing 3.Paper feeder 5 and the printing equipment 7 that will describe below all are contained in the housing 3.As shown in Figure 1, connected a dismountable paper-retaining device 9 in the left side of housing 3.Paper-retaining device 9 is made up of a paper retainer 11 and a retainer cover plate 13, is storing the paper 17 of bunchiness in the paper retainer 11.As shown in Figure 3, paper 17 is the continuous paper (for example Chuan Lian account ticket) that have perforation.The both sides of paper 17 also comprise a series of holes 19 that have predetermined space therebetween, and paper will be discussed hereinafter with paper feeder 5.

Retainer cover plate 13 is installed in rotation on the paper retainer 11, therefore, retainer cover plate 13 can be from Fig. 1 the position shown in the solid line be pivoted to the position of double dot dash line (imaginary line).But this structure of paper-retaining device 9 Drawing upons opens or closes.

As shown in Figure 5, on the wall of the housing 3 on paper-retaining device 9 next doors, be formed with a paper inlet 21 that is used for introducing paper 17.Shown in Fig. 2,5 and 6, the top of housing 3 also has the paper outlet 23 of a paper 17 that is used for output print.As shown in Figure 2, on an end at housing 3 tops, be provided with a pair of paper feeding switch 25 and 27.Paper feeding switch 25 is to be used for giving forward, and another paper feeding switch 27 is to be used for oppositely giving.

The structure of paper feeder 5 and printing equipment 7 is discussed now.At first paper feeder 5, as shown in Figure 4, are provided with a pair of feeding-in

roll

29 and 31 respectively in the left and right sides.As shown in Figure 5 and Figure 6, feeding-in

roll

29 and 31 is to fuse by axle 33.Be provided with a plurality of pins 35 on feeding-in

roll

29 and 31 the outer circumference surface, have predetermined interval between the pin 35.Therefore, pin 35 can be meshed with the hole 19 of paper 17, so just can successfully give paper.Except feeding-in

roll

29 and 31, also be provided with an idler roller 37 that is fixed on the axle 39.Idler roller 37 is forced to contact with a flexible member 40, and paper 17 is sandwiched between the two (as illustrated in Figures 5 and 6), therefore can apply predetermined tension force to the paper of giving towards printing equipment 7 17.

One end of axle 33 has been fixed a gear 41, and an end of axle 39 has also been fixed a gear 43.Also be provided with a drive motors (stepper motor) 45, the rotation of drive motors 45 is delivered to gear 47.Gear 47 and gear 49 engagements have been fixed another gear that does not illustrate with gear 49 same axis on the gear 49.Above-mentioned gear 41 and 43 is to be meshed with this gear that does not illustrate.Therefore, when drive motors rotated, it rotatablely moved and is delivered to

gear

47,49, unshowned gear, is gear 41 and 43 at last that paired feeding-in

roll

29 and 31 is rotated, and idler roller 37 also rotates simultaneously.Utilize said structure, paper is given towards printing equipment.

Next printing equipment 7 is discussed.As shown in Figure 5 and Figure 6, be provided with a pressing plate 51 in the printer, printhead 53 is in the opposite side of pressing plate 51.Pressing plate 51 and printhead 53 are faced mutually, and paper 17 is to be inserted between the two.Printhead 53 is to install and be fixed on the support 55, and support 55 can be gone up in the direction (direction that just is parallel to axle 33 and 39) perpendicular to Fig. 5 and Fig. 6 plane and move.Describe the situation of movement of support 55 below in detail.Have one to have a spiral fluted driving shaft 57 on it, driving shaft 57 comes driven rotary by a drive motors (not shown).On the other hand, a nut element (not shown) is arranged on the support 55, this nut element can cooperate with the helicla flute of driving shaft 57 and move.Utilize said structure, when unshowned drive motors rotated, support 55 was driven by driving shaft 57 and is moved, thereby printhead 53 is moved.

As shown in Figure 5 and Figure 6 paper outlet 23 below a paper-tear picture bar 59 is arranged.When the operator wants to tear printed paper 17, can tear (cut-out) paper 17 along this paper-tear picture bar 59.

In addition, also be provided with one and can detect the top of form checkout gear of holding before the paper 17 61.As shown in Figure 5 and Figure 6, the top of form checkout gear is arranged on the preposition, in order to detect through the feeding-in roll 29 of

paper feeder

5 and 31 paper 17.Top of form checkout gear 61 can be made of any known devices, for example mechanical device or Optical devices.

As a reference, in this embodiment of the present invention, adopt the device of machinery.

Now come the structure of description control device 63 in conjunction with Fig. 7.A CPU (CPU) 65 is wherein arranged, and various types of orders are to import CPU65 from a main frame 67 through I/F (interface) 69.Then, CPU65 can read required information from ROM71, EEPROM (electric erazable programmable ROM) 73, RAM75 on the basis of the order of main frame 67, for example impose a condition etc.Then, CPU65 is by 77 pairs of above-mentioned paper feeders 5 of a driver and printing equipment 7 output control signals, so that carry out required paper feeding work and print job.In addition, the detection signal of top of form checkout gear 61 is transfused to CPU65, also is transfused to CPU65 from the signal of paper feeding switch 25 and 27.Then, CPU65 is by 77 pairs of paper feeders of driver, 5 output control signals.

In Fig. 7, label 79 expressions one driver, label 81 expressions one indicator, label 83 expressions one buzzer, and sink switch (dip switch) under label 85 expressions.

(operation) situation that moves according to the embodiment of the invention will be described below.

At first, in conjunction with Figure 14 and flow chart and Fig. 8 to 13 shown in Figure 15 its working condition is described.At step S1, power switch is forwarded to " opening ", at step S2 paper 17 is set.At step S2 paper 17 is set and to be meaned: the end that the operator holds paper 17 is inserted into paper inlet 21, and paper 17 is put into (each hole 19 on the paper 17 and the pin engagement of feeding-in roll 29 and 31) on the feeding-in

roll

29 and 31 of paper feeder 5, these can be seen from Fig. 8.Then, the operator is operated paper feeding switch 25 at step S3, and when making paper feeding switch 25 be in the position of " opening ", the counter (not shown) is step S4 zero clearing (being set at " 0 "), and paper feeder 5 is carried out the stepping paper feeding at step S5 place.Subsequently, arrive step S7 behind the control program process step S6,, can judge whether top of form checkout gear 61 detects the front end of paper 17 at step S7.When top of form checkout gear 61 does not detect the front end of paper 17, control program will proceed to step S8, judge whether paper feeding step number (value) has surpassed numerical value m.If the paper feeding step number has surpassed m, so just can judge paper setting mistake (step S9) has taken place.In so a kind of course of work, paper feeding step number m should be enough to make the front end of mounted paper 17 to arrive top of form checkout gear 61 and make top of form checkout gear 61 detect the front end of paper 17.If the quantity of step is less than m, control program will return step S5.That is to say that the giving of paper will be performed until till the front end that top of form checkout gear 61 detects paper 17.

When top of form checkout gear 61 detects the front end of paper 17 at step S7 place, control program will forward step S10 to, as shown in figure 10, carry out L (L step) paper feeding.Subsequently, stop paper feeding, counter make zero at step S12 place (being set at " 0 ") at step S11 place.In this state, the front end of paper 17 is in the place near printing equipment 7, and the operator can with the naked eye determine the state of paper 17.Because the paper 17 usefulness L step is to printing equipment 7 (forward) primary feed, so when the operator firmly grasps paper 17, or when the operator drew paper 17 on the direction opposite with paper feeding direction, the paper feed in this L step can give a warning to these maloperations of operator.In addition, when the operator inserts paper 17 on the bias, and when being placed to paper 17 on the paper feeder 5 under the state of this deflection, the operator can with the naked eye determine paper 17 jam situations.

Then, control program proceeds to step S13, and paper 17 oppositely stepping is given.Subsequently, control program proceeds to step S15 behind step S14, in step 15, judges whether top of form checkout gear 61 switches to the position of " pass ".Do not switch at the top of form checkout gear under the situation of " pass ", when the step number of paper feed surpasses numerical value L+ α (step S16) simultaneously, can judge that top of form having occurred sets wrong (step S17).In this case, numerical value L+ α represents the enough big step number that paper begins feeding from the stop position of step S11, and the front end of paper 17 just arrives through these step numbers just and be detected by top of form checkout gear 61.

On the other hand, if top of form checkout gear 61 switches to " pass " at step S15 place, control program will proceed to step S18, and paper 17 is incited somebody to action additionally the feed reversing n step again and stopped, and this can see from Figure 11.Feed reversing n step is in order to eliminate the backlash of gear train that is used for transferring rotational motion as shown in Figure 4 to paper again.Then, control program proceeds to step S20, paper 17 stepping forward, and judge at step S21 place whether the top of form checkout gear switches to "open" state.Therefore, can carry out paper always and give, detect the front end of paper 17 until top of form checkout gear 61, as shown in figure 12.Subsequently, the feeding t step (step S22) stops paper feed (step S23) on direction forward.The step number t of paper feed begins until the required step number in position of printing beginning corresponding to the position from top of form checkout gear 61, and such step number is the type according to the paper form, or the form of " printing in advance " determines, as shown in figure 13.Carrying out such operation just can be set to the front end of paper 17 on the preposition.Then, based on the order that paper is printed, on first of paper 17, print.After printing was finished, the operator utilized paper-tear picture bar 59 that the paper 17 that printing finishes is torn and taken off.

Above-mentioned operating process is that the setting from paper 17 begins up to till first of paper 17 prints.

In aforesaid print job finished, the front end that should be printed the paper 17 of (second paper) had once more passed through printing equipment 7, and arrives at the cutting part of paper-tear picture bar 59.Subsequently, if the order that has need on second paper of account ticket, to print, just can be along with this order begin to carry out work, this will be described in conjunction with the flow chart shown in Figure 16 and 17 hereinafter.

At first, the order of on second paper of step S24 place output, printing at the account ticket.Then, control program proceeds to step S25, judges at step S25 whether top of form checkout gear 61 is transformed into the position of " opening ".As mentioned above, because paper 17 has passed through printing equipment 7, and has arrived the cutting position of paper-tear picture bar 59, so top of form checkout gear 61 can be transformed into " holding " usually.Yet if there is not remaining paper 17, top of form checkout gear 61 will be transformed into " pass ", and control program proceeds to step S26 and is judged as the mistake of generation " no paper ", and the operator just can install paper 17 like this.

When top of form checkout gear 61 was transformed into " opening ", counter made zero (being set at " 0 ") at step S27 place, and control program proceeds to step S28, and paper 17 carries out feed reversing.Subsequently, control program proceeds to step S30 behind step S29, can judge at step S30 place whether top of form checkout gear 61 is transformed into " opening ".That is to say that paper 17 feed reversings are till paper 17 passes through the detection position of top of form checkout gear 61.In addition, can judge at step S31 place whether the step number of paper feed has surpassed numerical value t+ α,, just be judged as top of form setting wrong (step S32) has taken place if surpassed t+ α.In this case, numerical value t+ α represents: paper 17 begins this enough big step number of feeding from the stop position of step S23, and makes the front end of paper 17 arrive top of form checkout gear 61 and be detected.If top of form checkout gear 61 is transformed into " pass " at step S30 place, control program will proceed to step S33, and paper 17 is incited somebody to action additionally the feed reversing n step again, and stop at step S34 place.

Subsequently, as shown in figure 17, control program proceeds to step S35, and paper 17 stepping forward judges at step S36 place whether the top of form checkout gear is " opening ".So, on direction forward, carry out paper and give, detect the front end of paper 17 until top of form checkout gear 61.When top of form checkout gear 61 is defined as " opening ", can on direction forward, make the paper feed t step (step S37), the feeding of paper stops at (step S38) on that position.So just the front end of second paper of paper 17 can be set on the preposition.Subsequently, when finishing printing on the following a piece of paper (second paper just) at paper 17, can make paper 17 feed reversings once, until the front end of second paper of paper 17 detection position by top of form checkout gear 61, subsequently, similar to the situation that is provided with of a piece of paper front end of paper 17, the front end that can be by detecting paper and the scheduled volume (step number) of paper feed and the front end of second paper of paper 17 is arranged on the precalculated position.

This present embodiment has the following advantages:

At first, in the assignment procedure of paper 17, when the paper position skew takes place because of operator's maloperation, can be revised, therefore the front end of paper accurately can be set on the precalculated position the position of skew.For example, have such a case: when the operator to will be set by the paper 17 that paper feeder 5 is given automatically subsequently the time, the operator may catch mistakenly or instead hold paper 17 in the opposite direction with paper feeding.After so a kind of maloperation, paper 17 is incited somebody to action oppositely feeding once, thereby top of form checkout gear 61 can detect the front end of paper 17 again.Then, when paper feed after predetermined amount, the front end of paper just can be set on the preposition.Therefore, in the assignment procedure of paper, if because of operator's maloperation causes the position of paper to be offset, such skew will can not influence the setting of top of form.

Secondly, when printing the order of next account ticket, may have such a case: the operator may pull out the next scraps of paper 17 mistakenly in the process of tearing printed paper 17.At this moment, paper 17 oppositely feeding once, thereby top of form checkout gear 61 can detect the front end of paper 17 again, then again by the predetermined amount of paper feed just can be set to the front end of paper on the precalculated position.Therefore, mentioned above can not taking place because of move the problem of the top of form position skew that produces in the offset of paper cutting process meta.

As mentioned above, because can guarantee top of form is set on the preposition, can improve print quality.Particularly when printing on the paper 17 " printing in advance ", the position of printing is accurately to stipulate, very slight position skew all will have a strong impact on print quality.But under the situation of this embodiment of the invention, can make to print on accurate position becomes possibility.

In the installation process of paper, because paper feeding L step once on direction forward, so when the operator caught paper 17 or hold paper 17 on the direction opposite with paper feeding direction, the operator will be cautioned.In addition, when paper 17 deflections mistakenly, the operator inserts and when paper being placed on the paper feeder 5 with the state of this deflection, the operator can also with the naked eye determine whether to occur the holding paper phenomenon.

In addition, in the process of reverse paper feed, be designed to eliminate the backlash of the gear train of transmission mechanism according to embodiments of the invention.Therefore, the position skew that the backlash because of gear train causes can not take place.

Obviously, the present invention is not limited to the foregoing description.

The illustrated printer arrangement of the foregoing description only is an example of the present invention, and the present invention can be used to various types of printers.

Though be described hereinbefore, the top of form checkout gear is not limited to the pattern of machinery, also can adopt the Optical devices of known any kind.

Claims

1. the top of form setting apparatus of a printer comprises:

One printing equipment is in order to print on paper;

One paper holder is in order to store described paper;

One paper feeder, with so that described paper forward towards the printing equipment feeding, or oppositely towards the feeding of described paper holder;

One control device is in order to control described printing equipment and described paper feeder;

One top of form checkout gear is in order to detect the front end of the described paper of being given by described paper feeder;

One reverse paper feeder is set at the locational described paper of a printing in order to oppositely to give, and arrives at the detection position of described top of form checkout gear up to it, and more further the certain amount of described paper feed reversing; And

One paper feeder forward, in order to give the described paper of oppositely having given by described reverse paper feeder forward, arrive at the described detection position of described top of form checkout gear up to it, and further described paper is marched forward to certain amount again, thereby top of form is set on the preposition.

2. the top of form setting apparatus of a printer comprises:

One printing equipment is in order to print on paper;

One paper holder is in order to store described paper;

One first paper feeder forward, with so that described paper give forward, arrive at the described detection position of described top of form checkout gear up to it, and further described paper is marched forward to certain amount again, print on the position thereby top of form is set to one;

One reverse paper feeder, in order to oppositely give by described first forward paper feeder forwards to the described paper of giving, arrive at the detection position of described top of form checkout gear up to it, and more further the certain amount of described paper feed reversing; And

One second paper feeder forward, in order to give the described paper of oppositely having given by described reverse paper feeder forward, arrive at the described detection position of described top of form checkout gear up to it, and further described paper is marched forward to certain amount again, thereby top of form is set on the preposition.

3. device as claimed in claim 1, it is characterized in that, it also comprises a judgment means, when described reverse paper feeder has been carried out the enough amount of feeding so that pass through the detection position, but when still not discharged by the note detection that described top of form checkout gear carries out, described judgment means is inferred as the setting mistake that top of form has taken place.

4. device as claimed in claim 1 is characterized in that, described reverse paper feeder in the process of oppositely paper feeding the amount of predetermined feeding be an amount that is enough to eliminate the gear train backlash of described paper feeder.

5. device as claimed in claim 2, it is characterized in that, it also comprises a judgment means, when described first forward paper feeder carried out the enough amount of feeding forward so that arrive the detection position, but when described top of form checkout gear did not still detect the front end of described paper, described judgment means was inferred as the setting mistake that top of form has taken place.

6. device as claimed in claim 2 is characterized in that, described first forward the described predetermined amount of paper feeder institute's feeding in paper feeding process forward be one and be enough to make the operator can with the naked eye determine the amount of described paper.

7. device as claimed in claim 2, it is characterized in that, it also comprises a judgment means, when described reverse paper feeder has been carried out the enough amount of feeding so that pass through the detection position, but still do not have the time of release by the note detection that described top of form checkout gear carries out, described judgment means is inferred as top of form and sets mistake.

8. device as claimed in claim 2 is characterized in that, the amount of described reverse paper feeder institute's feeding in the process of reverse paper feed is an amount that is enough to eliminate the gear train backlash of described paper feeder.

9. the printer of certain position on certain one page that is used to set continuous form, described page has a front end, and this printer comprises:

One printhead is in order to print on described continuous form;

One continuous form feed apparatus is in order to give described continuous form;

One control device prints on the described page of described continuous form in order to control described printhead and described paper feeder;

One separator separates the page that described printing finishes in order to allow the user from described continuous form; And

One top of form is set control device, in order to the page that described printing finished described user from described continuous form separate until beginning at this section that next page begins to print in the period, according to a certain position of bringing in next page of setting described continuous form before next page.

10. the printer of certain position on certain one page that is used to set continuous form, described page has a front end, and this printer comprises:

One printhead is in order to print on described continuous form;

One top of form is set control device, when being set at a print position when described continuous form, the front end of described continuous form being given to a position that can be observed with the naked eye by the operator, sets certain position on the page.

11. a method that is used to detect the paper setting mistake in the printer comprises the steps:

Paper is sent into described printer;

When one first scheduled volume is arranged, determine whether this paper arrives a detection position in described paper has been admitted to described printer; If, make paper give one second scheduled volume forward, after having given second scheduled volume, the front end of paper is positioned on the primary importance of a relative printhead;

Make described paper oppositely give one the 3rd scheduled volume from first print position;

Described paper is given, up to determining that described paper is on described detection position forward; And

Described paper is given forward, be positioned on the second place of described relatively printhead up to the front end of described paper.